1155132513440 has 96 divisors (see below), whose sum is σ = 2788289650944. Its totient is φ = 452023290880.

The previous prime is 1155132513427. The next prime is 1155132513527. The reversal of 1155132513440 is 443152315511.

It is a happy number.

It is a super-2 number, since 2×1155132513440² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1155132513440.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17692055 + ... + 17757225.

It is an arithmetic number, because the mean of its divisors is an integer number (29044683864).

Almost surely, 2^{1155132513440} is an apocalyptic number.

1155132513440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1155132513440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1394144825472).

1155132513440 is an abundant number, since it is smaller than the sum of its proper divisors (1633157137504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1155132513440 is a wasteful number, since it uses less digits than its factorization.

1155132513440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67590 (or 67582 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

Adding to 1155132513440 its reverse (443152315511), we get a palindrome (1598284828951).

The spelling of 1155132513440 in words is "one trillion, one hundred fifty-five billion, one hundred thirty-two million, five hundred thirteen thousand, four hundred forty".